Electrochemical device

a technology of electrochemical devices and electrodes, which is applied in the direction of non-aqueous electrolyte cells, cell components, electrochemical generators, etc., can solve the problems of deteriorating charge-discharge cycle characteristics of secondary batteries, impaired incombustibility of nonaqueous electrolyte, etc., and achieve excellent charge-discharge cycle characteristics and incombustibility
US20060210876A1Inactive Publication Date: 2006-09-21KK TOSHIBA
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KK TOSHIBA
Publication Date
2006-09-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

An electrochemical device includes a case, a nonaqueous electrolyte filled in the case and containing a room temperature molten salt in an amount of 1 to 50 vol %, a first electrode housed in the case, and a second electrode housed in the case and containing a substance having a lamellar crystal structure. The room temperature molten salt contains a cation represented by formula (1) or formula (2) given below. R1 includes a carbonic acid ester group. Each of R2 and R3 denotes a substituent having an acyclic structure and having 4 or less carbon atoms, or R2 and R3 are combined to denote a substituent having a cyclic structure and having 4 or 5 carbon atoms. R4 includes a carbonic acid ester group, R5 has an acyclic structure and has 4 or less carbon atoms, and R6 denotes a hydrogen atom or a methyl group.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2005-077074, filed Mar. 17, 2005, the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to an electrochemical device.

[0004] 2. Description of the Related Art

[0005] In recent years, a lithium ion secondary battery or an electric double layer capacitor is promising as an electrochemical device used as a power source of, for example, electronic equipment or a vehicle.

[0006] An organic solvent based nonaqueous electrolyte prepared by dissolving an electrolyte in an organic solvent is used mainly as an nonaqueous electrolyte included in the electrochemical devices referred to above. It should be noted that the organic solvent is combustible. Therefore, in view of the improvement of the safety, various safety devices are mo...

Claims

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